Biblio

W. L. Bartlett, Dangel, M., Lupo, P., Marshall, A., y Lake Erie-Allegheny Earth Force, Erie, PA, USA, «Listening to the earth : an environmental audit for Benedictine communities». Earth Force, London, UK, p. x, 191 p., 2006.

A. Marshall, The state of world population 1997 : the right to choose : reproductive rights and reproductive health. New York, NY, USA: United Nations Population Fund, 1997, p. Web page (URL: http://www.unfpa.org/swp97e/toc.html) : 31 boxes, 7 fig., 5 tab.